import java.util.*;

public class Solution {
    public static void main(String[] args) {
        PriorityQueue<Integer> queue = new PriorityQueue<>();
        List<String> list = new ArrayList<>();
        Collections.reverse(list);
        String s = "abc";
        String s1 = "bbc";
        char c = 'a';
        char b = 'b';
        HashMap<Integer,Integer> map = new HashMap<>();
    }
}
